Neutrophil Count (Absolute)

What Neutrophils Do in Your Body

Neutrophils are a type of white blood cell that plays a critical role in your immune response. They detect and destroy bacteria and other harmful substances in your blood and tissues. When your body detects an infection or inflammation, neutrophils rush to the site to help fight it off. High neutrophil counts may indicate an active infection, inflammation, or other conditions like autoimmune diseases or certain cancers. Low counts can signal immune deficiencies or other health issues.

When Might You Need This Test?

Your doctor may order a neutrophil count test if you have symptoms like frequent infections, unexplained fevers, swelling, or signs of inflammation. It’s also used during medical evaluations for conditions like leukemia, chronic infections, or after treatments that affect your immune system.

Common Reasons for Testing

Common reasons include diagnosing infections, monitoring immune function, checking for blood disorders, or assessing responses to treatments like chemotherapy or steroids.

What to Expect Before the Test

This test typically involves drawing blood from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. No special preparation is usually needed, but always follow your doctor’s instructions.